Shock absorption and noise reduction limiting seat

Abstract

The utility model discloses a shock absorption and noise reduction limit seat which comprises a limit seat body used in cooperation with a piston, the limit seat body comprises a metal limit structure and a flexible buffer layer, and the flexible buffer layer is arranged at the butt joint position of the metal limit structure and the piston. The flexible buffer layer protrudes outwards relative to the end butt joint face of the metal limiting structure in the axial direction. The utility model has a simple structure, is suitable for various installation modes, and can realize structural buffer connection.

Description

Technical Field

[0001] This utility model relates to the field of mechanical processing equipment technology, and in particular to a shock-absorbing and noise-reducing limiting seat. Background Technology

[0002] In existing technology, six-sided drilling machines, as a type of high-efficiency multi-face machining special-purpose machine tool, are commonly used for simultaneously drilling holes on all six sides of a workpiece. The drill bit is one of the core components of a six-sided drilling machine, and its structure typically includes a gearbox, cylinder, piston, and limiting mechanism. During actual machining, the piston moves rapidly under the drive of compressed gas in the cylinder, causing the drill bit to extend and perform drilling. The end position of the drill bit is controlled by the limiting seat below. To ensure drilling accuracy, traditional limiting seat structures are generally made of metal and are in direct, rigid contact with the piston. While this structure achieves high positioning accuracy, with the increase in machining efficiency, the piston's movement speed accelerates, significantly increasing its impact force on the limiting seat. This results in greater vibration and noise during equipment operation, affecting the operating environment and equipment stability.

[0003] Therefore, there is an urgent need for a limiting seat structure that can effectively alleviate piston impact force and reduce noise. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a shock-absorbing and noise-reducing limiting seat with a simple structure, suitable for use with pistons, and with a buffer structure.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a shock-absorbing and noise-reducing limiting seat, including a limiting seat body used in conjunction with a piston, characterized in that: the limiting seat body includes a metal limiting structure and a flexible buffer layer, the flexible buffer layer is disposed at the position where the metal limiting structure and the piston are connected, and the flexible buffer layer protrudes outward in the axial direction relative to the end connection surface of the metal limiting structure.

[0006] Optionally, the end mating surface of the metal limiting structure may be provided with multiple spaced grooves, and the flexible buffer layer may include multiple annular elastic elements, which are respectively embedded in the grooves by vulcanization bonding.

[0007] Optionally, the inner side of the end of the metal limiting structure may be provided with an annular flange structure arranged in the circumferential direction, the flexible buffer layer is an integral annular elastic element, and the outer side of the flexible buffer layer is provided with an annular groove structure that fits into the annular flange structure, and is assembled to the end mating surface of the metal limiting structure by an interlocking connection.

[0008] Optionally, the end of the metal limiting structure may be provided with an annular mounting groove, and the flexible buffer layer may be an integral annular elastic element, which is fixed to the end mating surface by vulcanization bonding.

[0009] The beneficial effects of this utility model are:

[0010] This invention creates a flexible buffer layer on a metal limiting structure, forming a structure that protrudes outwards in height. This provides a buffer structure when used with a piston, effectively limiting the installation position of the buffer layer and facilitating structural processing and stable connection. Attached Figure Description

[0011] Figure 1 This is an assembly diagram of Embodiment 1 of the shock-absorbing and noise-reducing limiting seat of this utility model;

[0012] Figure 2 This is a cross-sectional view of Embodiment 1 of the shock-absorbing and noise-reducing limiting seat of this utility model;

[0013] Figure 3 This is an assembly diagram of Embodiment 2 of the shock-absorbing and noise-reducing limiting seat of this utility model;

[0014] Figure 4 This is a cross-sectional view of Embodiment 2 of the shock-absorbing and noise-reducing limiting seat of this utility model;

[0015] Figure 5 This is an assembly diagram of Embodiment 3 of the shock-absorbing and noise-reducing limiting seat of this utility model;

[0016] Figure 6 This is a cross-sectional view of embodiment 3 of the shock-absorbing and noise-reducing limiting seat of this utility model;

[0017] Figure 7 This is a cross-sectional view of the application structure of the shock-absorbing and noise-reducing limiting seat of this utility model in a cylinder device;

[0018] In the figure, 1-limiting seat body; 11-metal limiting structure; 12-flexible buffer layer; 111-flange structure; 121-groove structure; 2-piston. Detailed Implementation

[0019] The present invention will now be further described with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention in a schematic manner, and therefore only show the components relevant to the present invention.

[0020] This invention provides a shock-absorbing and noise-reducing limiting seat for use with a piston in a cylinder assembly, achieving end-point limiting of movement and providing a buffering and energy-absorbing function. The limiting seat includes a limiting seat body 1, which includes a metal limiting structure 11 and a flexible buffer layer 12. The metal limiting structure 11 is a rigid, integrally formed component, providing a reference contact surface for limiting the piston 2 at its end point. The flexible buffer layer 12 is disposed at the position where the metal limiting structure 11 abuts against the piston, and the flexible buffer layer 12 protrudes outward in the axial direction relative to the end abutment surface of the metal limiting structure 11.

[0021] like Figure 1 and Figure 2 The diagram shows an assembly schematic and cross-sectional view of Embodiment 1 of the vibration damping and noise reduction limiting seat of this utility model. In this embodiment, the limiting seat body 1 includes a metal limiting structure 11 and a flexible buffer layer 12. The metal limiting structure 11 is a ring-shaped rigid structure, and its end mating surface has multiple equally spaced grooves distributed along the circumferential direction. The number of grooves is determined according to the overall size of the limiting seat body 1, usually 3 to 4, and each groove is equally spaced along the circumferential direction. The flexible buffer layer 12 is composed of several arc-shaped elastic elements, the number of which corresponds to the number of grooves. Each segment of the flexible buffer layer 12 is bonded to the corresponding groove by vulcanization. The arc-shaped elastic elements are arranged around the periphery, and the outer surface of each arc-shaped elastic element has several evenly distributed circular protrusions, presenting a modular arrangement structure. After assembly, the flexible buffer layer 12 is arranged around the periphery as a whole, and protrudes outward in the axial direction relative to the end mating surface of the metal limiting structure 11, and the overall protrusion height does not exceed the height of the circular protrusions.

[0022] The aforementioned circular protrusions help to distribute the impact force across multiple points during the rapid downward press of the piston, thereby effectively reducing local stress concentration. Furthermore, the segmented flexible buffer layer facilitates local replacement.

[0023] like Figure 2 The diagram shows an assembly schematic and cross-sectional view of Embodiment 2 of the vibration damping and noise reduction limiting seat of this utility model. In this embodiment, the inner side of the end of the metal limiting structure 11 is provided with an annular flange structure 111, and the flexible buffer layer 12 is an integral annular elastic element with an annular groove structure 121 corresponding to the annular flange structure 111 on its outer side. Specifically, the number of the annular flange structure 111 varies according to the height change of the inner side of the end of the metal limiting structure 11, with at least one ring, and if there are multiple rings, the height is evenly distributed in the axial direction. The number of annular groove structures 121 is equal to the number of annular flange structures 111.

[0024] Furthermore, the flexible buffer layer 12 protrudes outward in the axial direction relative to the end mating surface of the metal limiting structure 11, and the protrusion height is not greater than the height of the annular groove structure 121. This effectively buffers piston impact during assembly and use, and ensures accurate positioning of the piston with the metal limiting structure. In actual assembly, the flexible buffer layer 12 is press-fitted with the annular flange structure 111 of the metal limiting structure 11 through the annular groove structure 121 on its inner side. The press-fit interference is controlled within the range of 0.2mm to 0.5mm. During assembly, a fixed connection is achieved at room temperature through a press-fit process, without the need for adhesives or mechanical fasteners such as screws.

[0025] Specifically, such as Figure 4 The figure shows a cross-sectional view of the application structure of Embodiment 2. The piston 2 is disposed inside the cylinder, with its lower end facing the flexible buffer layer 12 in the limiting seat body 1. After the cylinder is vented, the piston 2 moves downward at high speed along the axial direction. At the end of its stroke, the piston 2 first contacts the free end face of the flexible buffer layer 12. This free end face, being higher than the metal limiting structure 11, becomes the buffer medium that the piston first contacts. Subsequently, the flexible buffer layer 12 undergoes elastic compression under the impact force of the piston, effectively absorbing some kinetic energy and reducing the impact velocity. Finally, the piston 2 adheres to the end of the metal limiting structure 11, achieving precise limiting. During this process, the elastic deformation of the flexible buffer layer plays a structural buffering role, significantly reducing the instantaneous vibration and noise generated by direct metal-to-metal collisions, thereby achieving a simultaneous improvement in vibration reduction and noise reduction effects.

[0026] like Figure 3 The diagram shown is an assembly schematic of Embodiment 3 of the shock-absorbing and noise-reducing limiting seat of this utility model. Unlike Embodiment 2, in this embodiment, the end of the metal limiting structure 11 is provided with an annular mounting groove. The mounting groove is a semi-closed groove with the opening facing upwards. The flexible buffer layer 12 is an integral annular elastic element, whose shape matches the mounting groove. It is fixed in the mounting groove by vulcanization bonding, eliminating the need for a shape limiting fit structure. This is suitable for integral molding process.

[0027] In this invention, the flexible buffer layer 12 is made of an elastic material, preferably nitrile rubber, which has good resilience and oil resistance, helping to improve the buffer response performance. Different materials have different elastic moduli and hardness, and the corresponding structural height should be appropriately matched and adjusted. To achieve effective deceleration without affecting the piston positioning accuracy, the free end face of the flexible buffer layer 12 should have a certain height difference relative to the end mating surface of the metal limiting structure 11. The design of this height difference is structurally matched according to material properties, cylinder pressure, and positioning requirements, and generally needs to meet the following: during the downward pressing of the piston 2, the flexible buffer layer 12 first undergoes axial compression, and then the piston contacts the metal limiting structure 11 to form positioning. If the height difference is too large, the piston may not be accurately positioned; if it is too small, the buffering and shock absorption effect will be insufficient.

[0028] It should be noted that the above embodiments 1, 2, and 3 are merely schematic diagrams of several specific structural forms that can be adopted by this utility model, and the technical solution of this utility model is not limited to the structure shown in the figure. The material of the flexible buffer layer 12 can be replaced equivalently according to different application requirements, and the matching method between the metal limiting structure 11 of the limiting seat body 1 and the flexible buffer layer 12 can be selected and modified according to the assembly method, process requirements, material characteristics, etc., and is still within the protection scope of this utility model.

[0029] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A shock-absorbing and noise-reducing limiting seat, comprising a limiting seat body used in conjunction with a piston, characterized in that: The limiting seat body includes a metal limiting structure and a flexible buffer layer. The flexible buffer layer is disposed at the position where the metal limiting structure and the piston are connected, and the flexible buffer layer protrudes outward in the axial direction relative to the end connection surface of the metal limiting structure.

2. The shock-absorbing and noise-reducing limiting seat according to claim 1, characterized in that: The end mating surface of the metal limiting structure may be provided with multiple separated grooves, and the flexible buffer layer may include multiple annular elastic elements, which are respectively embedded in the grooves by vulcanization bonding.

3. The shock-absorbing and noise-reducing limiting seat according to claim 1, characterized in that: The inner side of the end of the metal limiting structure may be provided with an annular flange structure arranged in the circumferential direction. The flexible buffer layer is an integral annular elastic element. The outer side of the flexible buffer layer is provided with an annular groove structure that fits into the annular flange structure. It is assembled to the end mating surface of the metal limiting structure by an interlocking connection.

4. The shock-absorbing and noise-reducing limiting seat according to claim 1, characterized in that: The end of the metal limiting structure may be provided with an annular mounting groove, and the flexible buffer layer may be an integral annular elastic element, which is fixed to the end mating surface by vulcanization bonding.

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